Criminal offenses are punishable by incarceration.

Civil offenses are not.

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Mild speeding, no seatbelt, broken taillight are civil.

DUIs, reckless driving, hit-and-run are criminal.

All vehicular offenses, but different punishments.

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Unauthorized immigration to the US is NOT punishable by incarceration. (It can result in deportation to the nation of origin.)

>Criminal offenses are punishable by incarceration.

And what happens if you don't pay civil (or criminal) fines? A bench warrant gets issued and you get arrested. And if you get a contempt charge in all this guess where you can go?

The only "real difference" between a criminal offense where they "can" jail you but usually just fine you is procedural.

I would rather catch a bullshit DUI than have a local building commissioner coming after me for some violation. They're both $10k problems, but with one of them you have "real rights"

>Unauthorized immigration to the US is NOT punishable by incarceration.

The problem wasn't what the statutory punishment is or isn't.

The problem was the unilateral nature of it. Hence all the hoopla over warrant types, sloppy behavior, etc.